Gemstone



FIG. 1—is an upper perspective view showing our new design.

FIG. 2—is a lower perspective view thereof;

FIG. 3—is a top view thereof;

FIG. 4—is a first side view thereof;

FIG. 5—is a second side view thereof; and,

FIG. 6—is a bottom view thereof. 

We claim the ornamental design for a gemstone, as shown and described. 